[INFO] crate yabs 0.2.2 is already in cache
[INFO] checking yabs-0.2.2 against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1
[INFO] extracting crate yabs 0.2.2 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate yabs 0.2.2 on toolchain 1a608893c03d7722effeb0058e82770bd36b4b3c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate yabs 0.2.2
[INFO] finished tweaking crates.io crate yabs 0.2.2
[INFO] tweaked toml for crates.io crate yabs 0.2.2 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6ac854152a67f4176bfd281b83810a78db9ae4f9cf689e2ee6280cd34e816382
[INFO] running `"docker" "start" "-a" "6ac854152a67f4176bfd281b83810a78db9ae4f9cf689e2ee6280cd34e816382"`
[INFO] [stderr]     Checking yabs v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0277]: cannot add `&mut std::string::String` to `std::string::String`
[INFO] [stderr]   --> lib/ext.rs:94:36
[INFO] [stderr]    |
[INFO] [stderr] 94 |             *each = pre.to_owned() + each;
[INFO] [stderr]    |                                    ^ no implementation for `std::string::String + &mut std::string::String`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::ops::Add<&mut std::string::String>` is not implemented for `std::string::String`
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: cannot add `&mut std::string::String` to `std::string::String`
[INFO] [stderr]   --> lib/ext.rs:94:36
[INFO] [stderr]    |
[INFO] [stderr] 94 |             *each = pre.to_owned() + each;
[INFO] [stderr]    |                                    ^ no implementation for `std::string::String + &mut std::string::String`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::ops::Add<&mut std::string::String>` is not implemented for `std::string::String`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> lib/error.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | / error_chain! {
[INFO] [stderr] 14 | |     types {
[INFO] [stderr] 15 | |         YabsError, YabsErrorKind, Result;
[INFO] [stderr] 16 | |     }
[INFO] [stderr] ...  |
[INFO] [stderr] 44 | |     }
[INFO] [stderr] 45 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> lib/error.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | / error_chain! {
[INFO] [stderr] 14 | |     types {
[INFO] [stderr] 15 | |         YabsError, YabsErrorKind, Result;
[INFO] [stderr] 16 | |     }
[INFO] [stderr] ...  |
[INFO] [stderr] 44 | |     }
[INFO] [stderr] 45 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> lib/error.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | / error_chain! {
[INFO] [stderr] 14 | |     types {
[INFO] [stderr] 15 | |         YabsError, YabsErrorKind, Result;
[INFO] [stderr] 16 | |     }
[INFO] [stderr] ...  |
[INFO] [stderr] 44 | |     }
[INFO] [stderr] 45 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `yabs`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> lib/error.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | / error_chain! {
[INFO] [stderr] 14 | |     types {
[INFO] [stderr] 15 | |         YabsError, YabsErrorKind, Result;
[INFO] [stderr] 16 | |     }
[INFO] [stderr] ...  |
[INFO] [stderr] 44 | |     }
[INFO] [stderr] 45 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `yabs`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "6ac854152a67f4176bfd281b83810a78db9ae4f9cf689e2ee6280cd34e816382"`
[INFO] running `"docker" "rm" "-f" "6ac854152a67f4176bfd281b83810a78db9ae4f9cf689e2ee6280cd34e816382"`
[INFO] [stdout] 6ac854152a67f4176bfd281b83810a78db9ae4f9cf689e2ee6280cd34e816382